Kingstown Prison descends into total chaos. Mike desperately works to help stop a riot that will have serious consequences for all involved.

After Sara’s encounter with Mallus, the Legends are paid a visit by John Constantine, a demonologist detective. The Legends agree to accompany him to a present-day psychiatric hospital and they…

A rogue black ops team led by Onyx breaks into Kord Industries and steals something lethal. Oliver struggles to connect with William so he reaches out to a surprising source…

After Roy confesses that he’s the Arrow, Oliver is forced to lie low as Quentin continues his quest to prove that Oliver is the real Arrow. Meanwhile, a metahuman kills…

Peter, Olivia, Walter, Astrid and Broyles face off against the Observers in one final and extraordinary battle for the fate of mankind.

Floating in deep space with the city’s protective shield failing, the team must do all they can to keep Atlantis alive. A radical injury threatens Dr. Weir’s life.

With a group of Wraith hive ships on the way to Atlantis, the team searches for a place to flee and a way to destroy the city. McKay leads a…

Nearly a third of Atlantis’s residents are infected with a deadly virus that causes hallucinations and death, forcing a lockdown of the city.

Plagued by terrifying nightmares, Teyla begins to recall a time when she and her father were captured by the Wraith and subjected to disturbing experiments.

When a massive storm threatens the city, Atlantis is evacuated — only to be taken over by the team’s newest enemy.

The team finds themselves in mortal danger when their Puddle Jumper ship becomes lodged in the Stargate.

After a series of run-ins with the Wraith, the team begins to suspect their Athosian allies of having a spy in their midst.

A new Stargate team embarks on a dangerous mission to a distant galaxy, where they discover a mythical lost city — and a deadly new enemy.

Tensions rise between the Tok’ra and rebel Jaffa at the S.G.C.’s offworld base when they are attacked by an invisible enemy.